refactor _get to call _getmany...

vlanmang.py

@@ -188,24 +188,10 @@ class SNMPSwitch(object):
 			return varBinds
 
 	def _get(self, oid):
-		oid = ObjectIdentity(*oid)
-		oid.resolveWithMib(_mvc)
-
-		errorInd, errorStatus, errorIndex, varBinds = \
-		    next(getCmd(self._eng, self._cd, self._targ, ContextData(), ObjectType(oid)))
-
-		if errorInd: # pragma: no cover
-			raise ValueError(errorIndication)
-		elif errorStatus:
-			raise ValueError('%s at %s' %
-			    (errorStatus.prettyPrint(), errorIndex and
-			    varBinds[int(errorIndex)-1][0] or '?'))
-		else:
-			if len(varBinds) != 1: # pragma: no cover
-				raise ValueError('too many return values')
+		varBinds = self._getmany(oid)
 
-			varBind = varBinds[0]
-			return varBind[1]
+		varBind = varBinds[0]
+		return varBind[1]
 
 	def _set(self, oid, value):
 		oid = ObjectIdentity(*oid)